<template>
	<view>
		<!-- 搜索框 -->
		<view class="search-box">
			<uni-search-bar :radius="100" @input="input" cancelButton="none"></uni-search-bar>			
		</view>
		
		<!-- 搜索历史 -->
		<view class="history-box" v-if="searchResults.length === 0">
			<!-- 标题区域 -->
			<view class="history-title">
				<text>搜索历史</text>
				<uni-icons type="trash" size="34rpx" @click="clean"></uni-icons>
			</view>
			<!-- 列表区域 -->
			<view class="history-list">
				<uni-tag :text="item" v-for="(item, i) in histories" :key="i" @click="gotoGoodsList(item)"></uni-tag>
			</view>
		</view>
		
		
		<!-- 搜索建议 -->
		<view class="sugg-list" v-if="searchResults.length !== 0">
			<view class="sugg-item" v-for="(item,i) in searchResults" :key="i" @click="gotoDetail(item)">
				<view class="goods-name">{{item.goods_name}}</view>
				<uni-icons type="arrowright" size="32rpx"></uni-icons>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				timer: null,
				kw: '',
				//搜索的结果列表
				searchResults: [],
				//搜索历史
				historyList: ['a','app','apple']
			};
		},
		methods: {
			//输入事件
			input(e) {
				clearTimeout(this.timer)
				
				this.timer = setTimeout(()=>{
					this.kw = e
					
					this._getSearchList()
				},500)
			},
			
			async _getSearchList() {
				if(this.kw.length === 0){
					this.searchResults = []
					return
				}
					
				const {data: res} = await uni.$http.get('/api/public/v1/goods/qsearch',{query: this.kw})
				
				if(res.meta.status !== 200){
					return uni.$showMsg()
				}
				
				this.searchResults = res.message
				
				this._saveSearchHistory()
			},
			
			gotoDetail(item) {
				uni.navigateTo({
					url: '/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id
				})
			},
			
			_saveSearchHistory() {			
				const set = new Set(this.historyList)
				set.delete(this.kw)
				set.add(this.kw)
				this.historyList = Array.from(set)
				
				uni.setStorageSync('kw',JSON.stringify(this.historyList))
			},
			
			clean(e) {
				this.historyList = []
				uni.setStorageSync('kw','[]')
			},
			
			gotoGoodsList(item) {
				uni.navigateTo({
					url: '/subpkg/goods_list/goods_list?query=' + item
				})
			}
		},
		computed: {
			histories() {
				return [...this.historyList].reverse()
			}
		},
		onLoad() {
			this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
		}
	}
</script>

<style lang="scss">
	.search-box {
		position: sticky;
		top: 0;
		z-index: 999;
	}
	
	.sugg-list {
		padding: 0 10rpx;
		.sugg-item {
			display: flex;
			align-items: center;
			justify-content: space-between;
			font-size: 24rpx;
			padding: 26rpx 0;
			border: 2rpx solid #efefef;
			.goods-name {
				white-space: nowrap;
				overflow: hidden;
				text-overflow: ellipsis;
			}
		}
	}
	
	.history-box {
		padding: 0 10rpx;
		
		.history-title {
			display: flex;
			justify-content: space-between;
			height: 80rpx;
			align-items: center;
			font-size: 26rpx;
			border: 2rpx solid #efefef;
		}
		
		.history-list {
			display: flex;
			flex-wrap: wrap;
						
			.uni-tag {
				margin-top: 10rpx;
				margin-right: 10rpx;
			}
		}
	}
</style>
